Polyisocyanate prepolymers and their use

Abstract

The invention provides polyisocyanate prepolymers, characterised in that they contain polyether carbonate polyols as structural component, their preparation and their use as isocyanate component in 1- and 2-component systems for surface-coating compositions, adhesives and sealing materials.

1 .- 14 . (canceled) 
     
     
         15 . A polyisocyanate mixture, comprising a polyether carbonate polyol. 
     
     
         16 . The polyisocyanate mixture according to  claim 15 , characterised in that the polyether carbonate polyol is obtainable by addition of carbon dioxide and alkylene oxides to H-functional starter substances using multimetal cyanide catalysts (DMC catalysts). 
     
     
         17 . The polyisocyanate mixture according to  claim 15 , characterised in that it contains only aromatic isocyanates. 
     
     
         18 . The polyisocyanate mixture according to  claim 15 , characterised in that it contains only aliphatic isocyanates. 
     
     
         19 . The polyisocyanate mixture according to  claim 15 , characterised in that it contains only cycloaliphatic isocyanates. 
     
     
         20 . The polyisocyanate mixture according to  claim 15 , characterised in that it contains mixtures of aromatic and aliphatic isocyanates. 
     
     
         21 . The polyisocyanate mixture according to  claim 15 , characterised in that it contains mixtures of aromatic and cycloaliphatic isocyanates. 
     
     
         22 . The polyisocyanate mixture according to  claim 15 , characterised in that it contains mixtures of aliphatic and cycloaliphatic isocyanates. 
     
     
         23 . The polyisocyanate mixture according to  claim 15 , characterised in that it has an isocyanate content of from 3 to 30 wt. % and isocyanate functionality of 
     
     
         24 . The polyisocyanate mixture according to  claim 15 , characterised in that it has an isocyanate content of from 5 to 25 wt. % and isocyanate functionality of 2. 
     
     
         25 . A coating composition, surface-coating composition, adhesive, or sealing material comprising the polyisocyanate mixture according to  claim 15 . 
     
     
         26 . A one-component moisture-curing coating, curing coating, adhesive or sealing material comprising the polyisocyanate mixture according to  claim 15  without further additives. 
     
     
         27 . A two-component curing coating, adhesive or sealing material obtainable by reaction of
 (i) the polyisocyanate mixture according to  claim 15  with   (ii) at least one component selected from the group of the polyols and polyamines.   
     
     
         28 . The two-component curing coating, adhesive or sealing material according to  claim 27 , characterised in that polyacrylate polyols or aspartic acid esters are used as component (ii).